Local Govt | National News Video | Parliament Headlines | Politics Headlines | Search

 


Tsunami review reinforces need for public preparedness

Media release, 30 September 2013

Tsunami review reinforces need for public preparedness

The Review of Tsunami Hazard in New Zealand (2013 Update), released today, reinforces the need for the public to understand and be prepared to respond to the threat of a tsunami.

Summary of the three key points arising from the review:

-  The probability of a tsunami has not changed but the maximum possible size of a tsunami in some areas has increased.

-  A large tsunami generated very close to New Zealand would arrive before an official warning could be issued or sirens activated. People must know that if they are at the coast and feel a strong earthquake (it is hard to stand up) or a weak earthquake that lasts for a minute or more, then get to high ground or go inland. Do not wait for an official warning.

-  Councils are responsible for warning communities and developing local plans.

The main areas where tsunami caused by local and regional sources pose a greater hazard than previously understood include:

-  the coasts of Northland, the north-west part of the Auckland region, Great Barrier Island, the Coromandel Peninsula, and the Bay of Plenty;

-  the East Cape of the North Island, and parts of the Wairarapa coast

-  Southland, Stewart Island, Fiordland and Westland.

Resulting from the review, the Ministry of Civil Defence and Emergency Management will be:

-  Emphasising the existing public messages about tsunami

http://www.civildefence.govt.nz/memwebsite.nsf/Files/Tsunami-national-signage/$file/tsunami-brochure-final.pdf

-  Encouraging councils and the 16 regional CDEM Groups to reinforce the national public messages with more specific local and regional information.

-  In October and November, with GNS Science, holding regional seminars for CDEM Groups and other response agencies. The seminars will be a chance to clarify the review and discuss matters related to tsunami warnings, including public preparedness and alerting.

The Director of Civil Defence Emergency Management, John Hamilton, said the Ministry commissioned GNS Science to carry out the review to update research published in 2005.

The review shows the maximum possible size of some local and regional tsunami is bigger than previously understood, though tsunami are no more likely. (A tsunami from a local earthquake would arrive in less than one hour, and that from a regional earthquake would arrive in one to three hours.)

This is because there is now more uncertainty about the maximum possible size of earthquakes on plate boundaries near those areas.

The review considers “return periods” of up to 2,500 years. That is, what is the biggest tsunami that can be expected in such a period?

The review incorporates research on the 2004 Indian Ocean, 2009 South Pacific, and 2011 Tohoku (Japan) tsunamis. All were produced by earthquakes substantially larger than had been considered likely at those locations. There are now believed to be fewer restrictions on maximum magnitudes of earthquakes that could be created on tectonic plate boundaries. New scientific models take into account this increased uncertainty about the maximum possible size of earthquakes.

It is now also known there was a similar tsunami in Japan in AD 869. This indicates the interval between the biggest earthquakes there is over 1,000 years.

The tectonic plates in Japan are converging twice as fast as those around New Zealand, which suggests the interval between the largest earthquakes on our local plate boundaries could be more than 2,000 years.

However, New Zealand has only a brief historical record of 200 years, which is not long enough to provide accurate reported information. During that time the country has experienced about 10 tsunami of 5 metres or more.

Download from www.civildefence.govt.nz

Review of Tsunami Hazard in New Zealand (2013 Update)

-  Maps showing the regional differences between the 2005 and 2013 reviews.

ENDS

© Scoop Media

 
 
 
 
 
Parliament Headlines | Politics Headlines | Regional Headlines

 

Water, Pests, Erosion...: Commissioner Releases Mixed Report Card On Environment

The Parliamentary Commissioner for the Environment has released a mixed report card in her assessment of the state of New Zealand’s environment. “We are lucky to live in an exceptionally beautiful country, but we have some big issues to face up to” said Dr Jan Wright. More>>

ALSO:

Education: Private Schools Beneficiaries Of Extra Cash

“Not only did this year’s Budget freeze operational funding for state schools, but 86 per cent of secondary school principals say they don’t get enough funding, and the demand for school donations from parents is rising at 10 times the rate of inflation... Now we’ve got Hekia Parata proposing more cash for private schools." More>>

ALSO:

Shop Hours Bill Second Reading: Government Blocks Easter Trading Petition

The union representing retail workers is warning that the Government is out of touch with working people after passing the second reading of the Shop Trading Hours Amendment Bill, a law handing local authorities the power to permit trading on Easter Sunday. More>>

ALSO:

Gordon Campbell: On The Shewan Inquiry Into Our Tax Haven Rules

Like the political equivalent of lithium, Prime Minister John Key is routinely administered to dull any politically dangerous mood swings amidst the general public... More>>

ALSO:

Law Commission: Review Of Search And Surveillance Act Begins

“For example, the Act was drafted before cloud-based storage of data was commonplace. In the light of these and other developments, the Commission will be examining whether the investigative powers in the Act are sufficient for law enforcement purposes. We will also consider whether the safeguards that surround those processes are adequate.” More>>

ALSO:

Houses, Campers And Cops: LGNZ Media Briefing

At their quarterly media briefing today Local Government New Zealand addressed areas where local authorities are feeling pressure and outlined their approach for the upcoming local body elections in September-October. More>>

ALSO:

17 Year Sentences In Baby Moko Case: Attorney General On Plea Bargain

“The Crown’s decisions in this case, including the decision to accept the manslaughter pleas, were motivated by the need to secure convictions for this horrendous killing and to avoid the significant risk that either of the defendants could escape such a conviction because of evidential issues.” More>>

ALSO:

As Govt Cuts Lobby Anti-Smoking Group Funds: On The Nation - Plain Packaging Debate

Imperial Tobacco leaves open possibility of law suit against New Zealand government if plain packaging is introduced, as planned. Says it’s a “last resort” but “of course we will defend the right to use our brands”. More>>

ALSO:

Get More From Scoop

 

LATEST HEADLINES

 
 
 
 
 
 
 
 
 
Regional
Search Scoop  
 
 
Powered by Vodafone
NZ independent news